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Fix port script fails when DB has no backfilled events. (#8729)
Fixes #8618
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changelog.d/8729.bugfix
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Fix port script fails when DB has no backfilled events. Broke in v1.21.0.
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@ -876,14 +876,12 @@ class Porter(object):
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"ALTER SEQUENCE events_stream_seq RESTART WITH %s", (next_id,)
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)
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txn.execute("SELECT -MIN(stream_ordering) FROM events")
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txn.execute("SELECT GREATEST(-MIN(stream_ordering), 1) FROM events")
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curr_id = txn.fetchone()[0]
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if curr_id:
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next_id = curr_id + 1
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txn.execute(
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"ALTER SEQUENCE events_backfill_stream_seq RESTART WITH %s",
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(next_id,),
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)
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next_id = curr_id + 1
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txn.execute(
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"ALTER SEQUENCE events_backfill_stream_seq RESTART WITH %s", (next_id,),
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)
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return self.postgres_store.db_pool.runInteraction(
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"_setup_events_stream_seqs", r
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